<template>
	<transition name="slide">
		<div class="user-center">
			<div class="back" @click="back">
				<i class="icon-back"></i>
			</div>
			<div class="switches-wrapper">
				<switches :switches="switches"
				          :currentIndex="currentIndex"
				          @switch="switchItem"
				></switches>
			</div>
			<div class="play-btn" ref="playBtn" @click="random">
				<i class="icon-play"></i>
				<span class="text">随机播放全部</span>
			</div>
			<div class="list-wrapper" ref="listWrapper">
				<scroll v-if="currentIndex===0"
					        :data="favoriteList"
					        class="list-scroll"
					        ref="favoriteList"

					>
						<div class="list-inner">
							<song-list :songs="favoriteList" @select="selectSong"></song-list>
						</div>
					</scroll>
					<scroll class="list-scroll"
					        v-if="currentIndex===1"
					        :data="playHistory"
					        ref="playList"
					>
						<div class="list-inner">
							<song-list :songs="playHistory" @select="selectSong"></song-list>
						</div>
					</scroll>
			</div>
			<div class="no-result-wrapper" v-show="noResult">
				<no-result :title="noResultDesc"></no-result>
			</div>
		</div>
	</transition>
</template>

<script>
	import Switches from 'base/switches/switches'
	import {mapGetters,mapActions} from 'vuex'
	import Scroll from 'base/scroll/scroll'
	import SongList from 'base/song-list/song-list'
	import Song from 'common/js/song'
	import {playlistMixin} from 'common/js/mixin'
	import NoResult from 'base/no-result/no-result'
	export default {
		mixin: [playlistMixin],
		data() {
			return {
				currentIndex: 0,
				switches: [
					{name: '我喜欢的'},
					{name: '最近听的'}
				]
			}
		},
		computed: {
			noResult() {
				if(this.currentIndex === 0) {
					return !this.favoriteList.length
				} else {
					return !this.playHistory.length
				}
			},
			noResultDesc() {
				if (this.currentIndex === 0) {
					return '暂无收藏歌曲'
				}else{
					return '从未听过歌曲'
				}
			},
			...mapGetters([
				'favoriteList',
				'playHistory'
			])
		},
		methods: {
			handlePlaylist(playlist) {
				const bottom = playlist.length>0? '60px':''
				this.$refs.listWrapper.style.bottom = bottom
				this.$refs.favoriteList && this.$refs.favoriteList.refresh()
				this.$refs.playList && this.$refs.playList.refresh()
			},
			switchItem(index) {
				this.currentIndex = index
			},
			selectSong(song) {
				this.insertSong(new Song(song))
			},
			back() {
				this.$router.back()
			},
			random() {
				let list = this.currentIndex === 0 ? this.favoriteList : this.playHistory
				if(list.length === 0) {
					return
				}
				list = list.map((song) => {
					return new Song(song)
				})
				this.randomPlay({
					list
				})
			},
			...mapActions([
				'insertSong',
				'randomPlay'
			])
		},
		components: {
			Switches,
			Scroll,
			SongList,
			NoResult
		}
	}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .user-center
    position: fixed
    top: 0
    bottom: 0
    z-index: 100
    width: 100%
    background: $color-background
    &.slide-enter-active, &.slide-leave-active
      transition: all 0.3s
    &.slide-enter, &.slide-leave-to
      transform: translate3d(100%, 0, 0)
    .back
      position absolute
      top: 0
      left: 6px
      z-index: 50
      .icon-back
        display: block
        padding: 10px
        font-size: $font-size-large-x
        color: $color-theme
    .switches-wrapper
      margin: 10px 0 30px 0
    .play-btn
      box-sizing: border-box
      width: 135px
      padding: 7px 0
      margin: 0 auto
      text-align: center
      border: 1px solid  $color-text-l
      color: $color-text-l
      border-radius: 100px
      font-size: 0
      .icon-play
        display: inline-block
        vertical-align: middle
        margin-right: 6px
        font-size: $font-size-medium-x
      .text
        display: inline-block
        vertical-align: middle
        font-size: $font-size-small
    .list-wrapper
      position: absolute
      top: 110px
      bottom: 0
      width: 100%
      .list-scroll
        height: 100%
        overflow: hidden
        .list-inner
          padding: 20px 30px
    .no-result-wrapper
      position: absolute
      width: 100%
      top: 50%
      transform: translateY(-50%)
</style>